RFR (S) 8222231: Clean up interfaceSupport.inline.hpp duplicated code

[David Holmes]

Hi Coleen,

Thanks for doing this! It is all a lot simpler now. Reviewed with 
enthusiasm. :)

David

On 10/04/2019 9:58 am, coleen.phillimore at oracle.com wrote:
> Some code was left from removing code UseMembar and further improvements 
> encouraged by dholmes.  I also removed a couple redundant and unneeded 
> clear_unhandled_oops calls.  The one in ThreadBlockInVMWithDeadlockCheck 
> is in the calling code Monitor::lock, and the thread in vm from native 
> makes no sense.
> 
> Tested with runtime jtreg tests, and mach5 tier1-3 in progress.
> 
> open webrev at http://cr.openjdk.java.net/~coleenp/2019/8222231.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8222231
> 
> Thanks,
> Coleen